The most common and most likely answer to this crossword clue is the 4 letter word SUMS
S
U
M
S
More clues leading to the result SUMS
Buddy explains!

The straight part
We know that "Writing follows us up – in the primary curriculum?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case writing follows us up – in the primary curriculum? = sums.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SUMS mean?
SUMS noun- A type of administrative district used in China, Mongolia, and Russia. In Mongolia, a somon is smaller than a province. In China, it is only used in Inner Mongolia where it is equivalent to a township.
- A quantity obtained by addition or aggregation.
- (often plural) An arithmetic computation, especially one posed to a student as an exercise (not necessarily limited to addition).
- A quantity of money.
- A summary; the principal points or thoughts when viewed together; the amount; the substance; compendium.
- A central idea or point; gist.
- The utmost degree.
- An old English measure of corn equal to the quarter.
- To add together.
- To give a summary of.
- The basic unit of money in Kyrgyzstan.
- The basic unit of money in Uzbekistan.